Alliance Memory recently broadened its line of high-speed CMOS double data rate 2 synchronous DRAMs (DDR2 SDRAM). Its new device featuring high 2-Gb density in a 84-ball 8-mm × 12.5-mm × 1.2-mm FBGA package. The AS4C128M16D2 is available (from a limited number of suppliers) in commercial (0°C to +85°C) and industrial (–40°C to +95°C) temperature ranges.
The AS4C128M16D2 provides a drop-in, pin-for-pin-compatible replacement for a number of similar solutions in industrial, auto, consumer, networking, and medical products that require high memory bandwidth. It is internally configured as eight banks of 16M × 16 bits. The RoHS-compliant DDR2 SDRAM includes a synchronous interface and operates from a single 1.8-V (±0.1 V) power supply. In addition, it features a fast clock rate of 400 MHz and a data rate of 800 Mbps/pin. The DDR2 SDRAM provides programmable read or write burst lengths of 4 or 8. An auto precharge function provides a self-timed row precharge initiated at the end of the burst sequence. Easy-to-use refresh functions include auto- or self-refresh while a programmable mode register allows the system to choose the most suitable modes to maximize performance.
With the AS4C128M16D2, Alliance Memory now offers a variety of DDR2 SDRAMs with densities of 512 Mb, 1 Gb, and 2 Gb. Samples of the AS4C128M16D2 are available now, with lead times of six to eight weeks for production quantities. Pricing for US delivery starts at $6.50 per unit.
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